Appcelerator - Getting geolocation information and turning into a URL

I'm still very new to appcelerator but I'm trying to do a small experiment with geolocation. I have some code similar to below, which returns the long and lat to the console. What I would like to is get the long and lat and append them to a URL, e.g http://www.mywebsite.com/lat/long.

I've tried creating a simple alert to show me the current location in the but all it says is Alert: [object GeolocationModule].

Could somebody point me in the right direction so I can learn some more? Thank you

var url = "https://www.appcelerator.com/"+e.coords.longitude+"/"+e.coords.latitude;
var xhr = Ti.Network.createHTTPClient({
onload: function(e) {
// this function is called when data is returned from the server and available for use
// this.responseText holds the raw text return of the message (used for text/JSON)
// this.responseXML holds any returned XML (including SOAP)
// this.responseData holds any returned binary data
Ti.API.debug(this.responseText);
alert('success');
},
onerror: function(e) {
// this function is called when an error occurs, including a timeout
Ti.API.debug(e.error);
alert('error');
},
timeout:5000 /* in milliseconds */
});
xhr.open("GET", url);
xhr.send(); // request is actually sent with this statement